JavaScriptCollection
diff --git a/‎d3.js‎
Lines changed: 8 additions & 6 deletions b/‎d3.js‎
Lines changed: 8 additions & 6 deletions
@@ -186,12 +186,14 @@ d3 = function() {
     return entries;
   };
   d3.merge = function(arrays) {
-    var n = arrays.length, m = 0, i, j, k = -1, merged, array;
-    for (i = 0; i < n; ++i) m += arrays[i].length;
-    merged = new Array(m);
-    for (i = 0; i < n; ++i) {
-      for (array = arrays[i], m = array.length, j = 0; j < m; ++j) {
-        merged[++k] = array[j];
+    var n = arrays.length, m, i = -1, j = 0, merged, array;
+    while (++i < n) j += arrays[i].length;
+    merged = new Array(j);
+    while (--n >= 0) {
+      array = arrays[n];
+      m = array.length;
+      while (--m >= 0) {
+        merged[--j] = array[m];
       }
     }
     return merged;